Product Features: bull; 100% Brand New Wireless Vehicle Bluetooth FM Transmitter Car Charger bull; Answer calls, and play music over your phone safely. bull; Bluetooth Wireless connection, Build in microphone, FM transmitter+USB Charger+MP3 Player bull; Supports Bluetooth hand-free phone call , build-in microphone. bull; Noise cancelling technology that allow for clear and crisp phone calls and music. bull; With FM transmitter function, supports adjustment. Full-frequency covered 87.5-108.0MHz. bull; Allowed to accept MicroSD card up to 32G and play playing music on MP3/WMA form. bull; Come with 2 USB charging ports (5V/2.1A and 1.0A) for charging your smart phone or tablet. bull; The main button on the middle supports to change music or swap call, the near rotary knob is designed to adjust the volume. bull; Item comes with 30 days money back guarantee.Product Details: bull; Bluetooth version: V4.2 bull; Bluetooth protocol: A2DP, AVRCP bull; Bluetooth band: 2.4 GHz-2.48 GHz bull; Bluetooth Transmission distance: 5m bull; FM frequency: 87.5-108 mhz bull; FM transfer distance: 2meters bull; Input voltage: 12-24V bull; Output: 5V/2.1A bull; Music format: mp3, wmaPackage includes:1PC Car MP3 Player(only black)1PC User ManualOperation Guide:- Plug the FM transmitter into your car cigarette lighter socket for power and please find search this device .- Find an empty station and keep the FM transmitter and car FM radio at the same frequency.